Find the total number of terms in the expansion of (x + a)^11 - (x - a)^11 after simplification.
+2666 Note that \(-a^y = a^y\) when y is even.
This means that all the terms with an even-powered term will cancel out.
Thus, the resulting expansion will have \(\color{brown}\boxed{6}\) terms: \(a^{11}, a^9, a^7, a^5, a^3, a\)
